diff --git a/.travis.yml b/.travis.yml
index 52694032c7..0715b57272 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,8 @@
 language: node_js
 node_js:
-  - 4
   - 6
   - 8
-  - 9
+  - 10
 sudo: false
 before_install:
   - curl -L https://unpkg.com/@pnpm/self-installer | node
diff --git a/package.json b/package.json
index 559e2a4b7d..bb3634c630 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "lib"
   ],
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   },
   "scripts": {
     "lint": "tslint -c tslint.json --project .",